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SLSQ-B-N
Diameter φD
Focal length f
Edge thickness te
Center thickness tc
Back focal length fb
Radius of curvature r
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These biconcave lenses are used when a very high negative power is required. They can be used in a multi-element system or alone to produce a diverging cone or virtual image. Sharpe edges, which are common in negative lenses, are removed by beveling to reduce the likelihood of chipping.

◦There are two types of biconvex lenses available; synthetic fused silica for wavelengths less than 350nm ultraviolet light.
◦Consult our Sales Division for anti-reflection coatings suitable for your application.
◦Our lenses are listed by outside diameter and focal length to assist your selection according to required specifications.

Related product
Products
Technical Data
Documents/Downloads
Guide

▶Lenses are available in a large selection and in custom sizes and focal lengths.
▶In addition to our standard coating we offer custom anti-reflective coating at specific wavelengths.
▶Please refer to here for Wavelength Characteristic Data (Reference Data, EXCEL file format).

Attention

▶When a concave lens is used in combination with a convex lens it will be able to converge the light and can projected a suitable image.
▶The biconvex spherical lens has chromatic aberration, and the focal length will vary depending on the wavelength. Please check the “wavelength characteristic of the focal length data” on “Technical Data” for the focal lengths of each wavelength.
▶Transmissions losses due to reflection off the front and rear surfaces of the lens can be minimized by coating the surfaces. Consult our Sales Team for anti-reflection coatings suitable for your application.
▶The outer edge of the concave side is chamfered and the result is possibility that the lens may have a smaller edge thickness for this design.

Common Specifications
MaterialBK7
Design Wavelength546.1nm
Refractive index ne1.46
CoatingUncoated
Clear aperture90% of the diameter
Surface Quality (Scratch-Dig)20-10
Outline Drawing

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Schematic

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Typical Transmittance Data

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T: Transmission
Reference Data
Spec
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Part Number
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    JP Yen Stock Qty
SLSQ-10B-10N
SLSQ-10B-15N
SLSQ-10B-20N
SLSQ-10B-25N
SLSQ-10B-30N
SLSQ-10B-40N
SLSQ-10B-50N
SLSQ-15B-15N
SLSQ-15B-20N
SLSQ-15B-25N
SLSQ-15B-30N
SLSQ-15B-40N
SLSQ-15B-50N
SLSQ-20B-20N
SLSQ-20B-25N
SLSQ-20B-30N
SLSQ-20B-40N
SLSQ-20B-50N
SLSQ-25B-25N
SLSQ-25B-30N
SLSQ-25B-35N
SLSQ-25B-40N
SLSQ-25B-50N
SLSQ-25B-60N
SLSQ-25B-70N
SLSQ-25B-80N
SLSQ-25B-90N
SLSQ-25B-100N
SLSQ-25.4B-25N
SLSQ-25.4B-30N
SLSQ-25.4B-40N
SLSQ-25.4B-50N
SLSQ-25.4B-60N
SLSQ-25.4B-70N
SLSQ-25.4B-80N
SLSQ-25.4B-90N
SLSQ-25.4B-100N
SLSQ-25.4B-150N
SLSQ-25.4B-200N
SLSQ-30B-30N
SLSQ-30B-35N
SLSQ-30B-40N
SLSQ-30B-50N
SLSQ-30B-60N
SLSQ-30B-70N
SLSQ-30B-80N
SLSQ-30B-90N
SLSQ-30B-100N
SLSQ-40B-40N
SLSQ-40B-50N
SLSQ-40B-60N
SLSQ-40B-70N
SLSQ-40B-80N
SLSQ-40B-90N
SLSQ-40B-100N
SLSQ-50B-50N
SLSQ-50B-60N
SLSQ-50B-70N
SLSQ-50B-80N
SLSQ-50B-90N
SLSQ-50B-100N
SLSQ-50.8B-50N
SLSQ-50.8B-60N
SLSQ-50.8B-70N
SLSQ-50.8B-80N
SLSQ-50.8B-90N
SLSQ-50.8B-100N
SLSQ-50.8B-150N
SLSQ-50.8B-200N
SLSQ-50.8B-250N
SLSQ-50.8B-300N

φ10mm

−9.7mm

5mm

2mm

−10.3mm

9.2mm

<1′

φ10mm

−14.7mm

3.9mm

2mm

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13.8mm

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φ10mm

−19.7mm

3.4mm

2mm

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18.4mm

<1′

φ10mm

−24.7mm

3.1mm

2mm

−25.3mm

23mm

<1′

φ10mm

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2.9mm

2mm

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27.6mm

<1′

φ10mm

−39.7mm

2.7mm

2mm

−40.3mm

36.8mm

<1′

φ10mm

−49.7mm

2.5mm

2mm

−50.3mm

46mm

<1′

φ15mm

−14.7mm

6.4mm

2mm

−15.3mm

13.8mm

<1′

φ15mm

−19.7mm

5.2mm

2mm

−20.3mm

18.4mm

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4.5mm

2mm

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23mm

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φ15mm

−29.7mm

4.1mm

2mm

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27.6mm

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φ15mm

−39.7mm

3.5mm

2mm

−40.3mm

36.8mm

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φ15mm

−49.7mm

3.2mm

2mm

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46mm

<1′

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−19.7mm

7.9mm

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−20.3mm

18.4mm

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φ20mm

−24.7mm

6.6mm

2mm

−25.3mm

23mm

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φ20mm

−29.7mm

5.8mm

2mm

−30.3mm

27.6mm

<1′

φ20mm

−39.7mm

4.8mm

2mm

−40.3mm

36.8mm

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φ20mm

−49.7mm

4.2mm

2mm

−50.3mm

46mm

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φ25mm

−24.7mm

9.4mm

2mm

−25.3mm

23mm

<1′

φ25mm

−29.7mm

8mm

2mm

−30.3mm

27.6mm

<1′

φ25mm

−34.7mm

7.1mm

2mm

−35.3mm

32.2mm

<1′

φ25mm

−39.7mm

6.4mm

2mm

−40.3mm

36.8mm

<1′

φ25mm

−49.7mm

5.5mm

2mm

−50.3mm

46mm

<1′

φ25mm

−59.7mm

4.9mm

2mm

−60.3mm

55.2mm

<1′

φ25mm

−69.7mm

4.5mm

2mm

−70.3mm

64.4mm

<1′

φ25mm

−79.7mm

4.1mm

2mm

−80.3mm

73.6mm

<1′

φ25mm

−89.7mm

3.9mm

2mm

−90.3mm

82.8mm

<1′

φ25mm

−99.7mm

3.7mm

2mm

−100.3mm

92mm

<1′

φ25.4mm

−24.7mm

9.6mm

2mm

−25.4mm

23mm

<1′

φ25.4mm

−29.7mm

8.2mm

2mm

−30.4mm

27.6mm

<1′

φ25.4mm

−39.7mm

6.5mm

2mm

−40.4mm

36.8mm

<1′

φ25.4mm

−49.7mm

5.6mm

2mm

−50.4mm

46mm

<1′

φ25.4mm

−59.7mm

5mm

2mm

−60.4mm

55.2mm

<1′

φ25.4mm

−69.7mm

4.5mm

2mm

−70.4mm

64.4mm

<1′

φ25.4mm

−79.7mm

4.2mm

2mm

−80.4mm

73.6mm

<1′

φ25.4mm

−89.7mm

4mm

2mm

−90.4mm

82.8mm

<1′

φ25.4mm

−99.7mm

3.8mm

2mm

−100.4mm

92mm

<1′

φ25.4mm

−149.7mm

3.2mm

2mm

−150.4mm

138mm

<1′

φ25.4mm

−199.7mm

2.9mm

2mm

−200.4mm

184mm

<1′

φ30mm

−29.7mm

10.9mm

2mm

−30.3mm

27.6mm

<1′

φ30mm

−34.7mm

9.4mm

2mm

−35.3mm

32.2mm

<1′

φ30mm

−39.7mm

8.4mm

2mm

−40.3mm

36.8mm

<1′

φ30mm

−49.7mm

7mm

2mm

−50.3mm

46mm

<1′

φ30mm

−59.7mm

6.2mm

2mm

−60.3mm

55.2mm

<1′

φ30mm

−69.7mm

5.5mm

2mm

−70.3mm

64.4mm

<1′

φ30mm

−79.7mm

5.1mm

2mm

−80.3mm

73.6mm

<1′

φ30mm

−89.7mm

4.7mm

2mm

−90.3mm

82.8mm

<1′

φ30mm

−99.7mm

4.5mm

2mm

−100.3mm

92mm

<1′

φ40mm

−39.7mm

13.8mm

2mm

−40.3mm

36.8mm

<1′

φ40mm

−49.7mm

11.2mm

2mm

−50.3mm

46mm

<1′

φ40mm

−59.7mm

9.5mm

2mm

−60.3mm

55.2mm

<1′

φ40mm

−69.7mm

8.4mm

2mm

−70.3mm

64.4mm

<1′

φ40mm

−79.7mm

7.5mm

2mm

−80.3mm

73.6mm

<1′

φ40mm

−89.7mm

6.9mm

2mm

−90.3mm

82.8mm

<1′

φ40mm

−99.7mm

6.4mm

2mm

−100.3mm

92mm

<1′

φ50mm

−49.5mm

17.8mm

3mm

−50.5mm

46mm

<1′

φ50mm

−59.5mm

15mm

3mm

−60.5mm

55.2mm

<1′

φ50mm

−69.5mm

13.1mm

3mm

−70.5mm

64.4mm

<1′

φ50mm

−79.5mm

11.8mm

3mm

−80.5mm

73.6mm

<1′

φ50mm

−89.5mm

10.7mm

3mm

−90.5mm

82.8mm

<1′

φ50mm

−99.5mm

9.9mm

3mm

−100.5mm

92mm

<1′

φ50.8mm

−49.5mm

18.3mm

3mm

−50.5mm

46mm

<1′

φ50.8mm

−59.5mm

15.4mm

3mm

−60.5mm

55.2mm

<1′

φ50.8mm

−69.5mm

13.4mm

3mm

−70.5mm

64.4mm

<1′

φ50.8mm

−79.5mm

12mm

3mm

−80.5mm

73.6mm

<1′

φ50.8mm

−89.5mm

11mm

3mm

−90.5mm

82.8mm

<1′

φ50.8mm

−99.5mm

10.2mm

3mm

−100.5mm

92mm

<1′

φ50.8mm

−149.5mm

7.7mm

3mm

−150.5mm

138mm

<1′

φ50.8mm

−199.5mm

6.5mm

3mm

−200.5mm

184mm

<1′

φ50.8mm

−249.5mm

5.8mm

3mm

−250.5mm

230mm

<1′

φ50.8mm

−299.5mm

5.3mm

3mm

−300.5mm

276mm

<1′

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